Page 192 - Parker - Hydraulic and Lube Filtration Products

Guardian Operation Guardian Element Servicing

A. Remove all shipping plugs from the hoses and fi ttings. A. Flip the switch on the end of the unit to the “off” position
B. Connect the inlet and outlet hose assemblies to the unit. and disconnect the electrical plug.
C. Connect the wand assemblies, if required. B. Rotate the cover counter-clockwise and remove.
D. Place the inlet hose wand assembly into the fl uid to be C. Remove the element from the housing. Discard all
fi ltered and/or transferred. disposable elements. These elements are not cleanable,
E. Place the outlet hose/wand assembly into the container D. Place the new element In the housing, fi tting the o-ring
where the fl uid discharge is desired. neck into the large hole at the bottom.
F. Plug in the unit. E. Inspect the cover o-ring and replace if necessary.
G. Flip the switch on the end of the unit to the “on” posi- F. Replace the cover and hand-tighten.
tion.
NOTE 1: It is recommended that the Guardian be
NOTE: For no-mess transportation, the inlet and outlet cleaned and fl ushed between uses with
hose assemblies can be screwed together by dissimilar fl uids to prevent fl uid mixing.
removing the wand assembly. NOTE 2: Motor brushes may require changeout
every 500 service hours
Troubleshooting Guide

Problem Cause Solution
Does not start. ON/OFF switch. Turn switch on, replace switch if defective.
No electrical power. Plug in Guradian, check for tripped circuit breakers, check for
Rectifi er. blown fuses.
Motor overheats (160°F). Replace if defective.
Defective motor. Allow motor to cool, thernal overload will automatically reset.
Replace motor.
Does not start or errattic Worn motor brushes. Replace motor brushes.
motor noise.
Intermittent start.stop oera- High viscosity fl uids. High viscosity fl uids can cause the motor to overheat and cycle
tion. Worn motor brushes. intermittently.
Defective motor. Replace motor grushes.
Replace motor.
Hot motor. Pumping under heavy load. It is normal, under a heavy pumping load for the motor to reach
Defective motor. 160°F.
Replace motor if shell temperature reaches greater than 170°F.
No fl ow or erratic pump Filter housing not fi lled with oil. Allow Guardian to run a few seconds.
noise. Suction leak. Check tghtness of inlet fi ttings and hoses. Check gaskets are
Obstructed outlet. in place and are not damaged. Kink or restriction in the inlet
Element dirty. hose.
Sheared pump key. Clear outlet.
Defective Guardian. Replace or clean element.
Replace woodruff key.
Replace unit.
No fl ow, erratic pump noise, Gears binding. Disassemble Guardian and throroughly clean the gear set.
motor overheats. Always use the inlet strainer provided to protect the unit.
Replace defective gears.
No suction. Plugged strainer. Clean or replace the inlet strainer as required.
Clean relief valve. Check for damaged internal o-rings.
Reduced oil fl ow. High viscosity fl uids. High viscosity fl uids can cause reduced fl ow, which is normal.
Element dirty. Replace or clean element.
Relief valve sticks or is lodged Clean releif valve or replace if defective.
open. Clear the hose obstruction.
Partially obstructed inlet or Check tightness of inlet fi ttings and hose.
outlet hose. Replace gear set.
Suction leak.
Worn gears.
Indicator moves to RED Element dirty. Replace or clean element.
Area. Oil extremely cold or viscous. Change element to coarser micron rating.
Obstruced outlet. Clear outlet obstruction.
Defective indicator. Replace indicator.
Indicator dows not seem to No element. Install element.
move. Defective indicator. Replace indicator.
Joses discolor or are hard. Fluid compatibility. Certain fl uids, over time, will cause the hoses to discolor. This
does not impair their performance. But, some fl uids will cause
the hoses to become brittle, requiring replacement.
Oil formation under unit. Defective shaft seal. Replace the motor shaft seal.

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